Patents by Inventor Clayton L. Brundidge

Clayton L. Brundidge has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4216702
    Abstract: A regenerative hydraulic system includes a control circuit having a pressure sensing valve therein. The valve is in fluid communication with a pump and a work cylinder causing the cylinder to be actuated at a relatively high velocity during a first increment of displacement by employing regenerative techniques which interconnect the head and rod sides of the cylinder. Pressure increases due to encountering a load are monitored, and at a predetermined value, the system switches to a non-regenerative mode in which the effective force exerted by the cylinder is substantially increased. Upon switching to the non-regenerative mode, the system is latched and will remain so until the system fluid pressure drops to a second predetermined value which is substantially smaller than the first pressure, resulting in a hysteretic control characteristic which will prevent an unstable condition. A dual rate spring is included within the valve urging it into the regenerative position.
    Type: Grant
    Filed: May 1, 1978
    Date of Patent: August 12, 1980
    Assignee: Eaton Yale Ltd.
    Inventors: Clayton L. Brundidge, William H. Bechman